LE2416RDXA

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9

4) Acknowledge Bit (ACK)

The Acknowledge Bit is used to indicate a successful byte data transfer. The receiver sends a zero to

acknowledge that it has received each word (Device Code, Slave Address etc) from the transmitter.

5) Device addressing

To transmit between the bus master and slave device (EEPROM), the master must send a Start condition

to the EEPROM. The device address word of the EEPROM consists of 4-bit Device Code, 3-bit Memory

address and 1-bit read/write code. By sending these, it becomes possible to communicate between the

bus master and the EEPROM.

The upper 4-bit of the device address word are called the Device Code, the Device Code of the EEPROM

uses 1010b fixed code. This device does not have the Slave address.

When the Device Code and Memory address (A10, A9, A8) are received on the SDA, the device only

responds. The 8

If a match occurs on the Device Code, the corresponding device gives an acknowledgement on SDA

during the 9

into the Standby mode.

1

0

1

0

A10

A9

A8

R/W

Device Code

Memory

Address

MSB

LSB

Device address word

Acknowledge

Bit output

Start

condition

1

SCL

(From Transmitter)

SDA

(From Transmitter)

SDA

(EEPROM output)

8

9